Only admins can change the status of the report but I wouldn't bother them with it as nobody is going to care about one report.
I also had a situation where the report was marked as bad, although it was a very obvious mistake of whoever handled the report (it was a referral link). I contacted the moderator in charge of that board, and he deleted the ref link, but of course the report still remained marked as bad. I have to admit that I was not aware that only admin/s can change that status. This is good information for all those who find themselves in a similar situation, and I think that in most cases there is no need to burden admins with such things.
Mods handle thousands of reports a month so occasionally ones will be incorrectly marked though it will be fairly rare. I remember one time back when I was a reporter I had one marked incorrectly as bad and BadBear did manage to sort it for me and get it changed but it honestly doesn't matter really unless you're going for a perfect 100% or something. I think theymos has mentioned before that anything over 80% is considered very good so one or two bad reports or incorrectly marked bad reports really isn't going to make a difference.